Justify each of the following statements.
Cell membrane or plasma membrane is described as selectively permeable membrane.

Explanation

### Step-by-Step Solution:

1. **Definition of Selectively Permeable Membrane**:
- A selectively permeable membrane is one that allows certain substances to pass through while restricting others. This characteristic is crucial for maintaining the internal environment of the cell.

2. **Function of the Cell Membrane**:
- The cell membrane, also known as the plasma membrane, serves as a barrier that regulates the entry and exit of various molecules. It is composed of a phospholipid bilayer with embedded proteins that facilitate transport.

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